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Curvature

Curvature

Earth Curvature Calculator

2 ratings
2 reviews
#192 in paid Utilities
🔧 Utilities
🔍 Reference
$1.99

Details

  • Released
  • Updated
  • November 8, 2018
  • March 6, 2026

Features

Developer

Steven Wilkinson
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Curvature screenshot #1 for iPhone
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Curvature screenshot #5 for iPhone
iphone
ipad
📊no. 192
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⭐2
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓8 answered
FAQ↘︎
📦~ in 2 months
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About

This app provides advanced tools for calculating and visualizing earth measurements, including curvature, horizon distance, and drop distance. It features a redesigned interface with precision mapping, data persistence, and a knowledge hub with research resources.

✓Advanced Earth Calculators
✓Graphic Result Visualization
✓Precision Mapping Tools
✓Data Persistence with SwiftData
✓Expanded PDF Library
✓Universal Unit Converter
✓Save & Export Calculations
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What's New in Curvature

Version 2.2

March 6, 2026

Changed app icon. Changed deployment to iOS 17 and above.

Charts

Top Paid

📊 192

Utilities

The app has maintained its position at 192 recently.

Last updated on July 18, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Real Science

This app is extremely accurate and provides actual data instead of fairy tales. Our eyes can’t see curvature, only straight lines. It’s pretty fun to do experiments with it. I suggest using it over water. From San Mateo shore to Treasure Island is about 18 miles. With my telescope 4 feet above the water it says there is about 160 feet hidden behind the curve which means most of the island shouldn’t be visible. In reality through our telescope we could see the water splashing on the shore, so yeah… Real science.
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Firmanent LoverFirmanent Lover

Response from developer

Thank you. I recently updated the app with lots of new features and accuracy and had a full design from the ground up. Please update and wish you all the best!

Great Earth Curvature app

Finally, been waiting for a decent Earth Curvature app, since there isn’t any others on the app store. Also love the zetetic astronomy pdf thats included, already used this near my home.
Great, easy to use map section too.
LeonNewcLeonNewc

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FAQ

What is Curvature?

Curvature is a comprehensive utility app designed for calculating and visualizing earth measurements. It offers advanced tools for analyzing globe geometry and exploring flat earth models, with features like a curvature calculator, horizon calculator, and precision mapping.

What are the key calculation tools in Curvature?

Curvature includes an advanced Earth Calculator for accurate results with graphic representation, a Quick Horizon Calculator to determine distance to the horizon based on height, and a Quick Curvature Drop tool for rapid drop-distance calculations.

How does Curvature handle saved data?

Powered by SwiftData, Curvature ensures your saved measurements, Points of Interest (POIs), and calculations are stored securely and organized into folders directly on your device for easy access and persistence.

Can I import my own research documents into Curvature?

Yes, Curvature features an expanded PDF library that allows you to import and store your own PDF documents directly within the app, in addition to organizing research materials and web resources.

What unit conversions are supported by Curvature?

Curvature includes a Universal Unit Converter that seamlessly handles conversions for Distance, Speed, Weight, Temperature, Area, Volume, and Time, making it a versatile tool for various measurement needs.

What is the price of Curvature?

Curvature is available for a one-time purchase of $1.99. This provides access to all its features without any ongoing subscription fees or additional in-app purchases.

Does Curvature have ads?

No, Curvature does not contain advertisements. It is a paid application designed to offer an uninterrupted user experience for its measurement and research tools.

How often is Curvature updated?

Curvature was last updated to Version 2.2 on March 6, 2026. While specific update frequency isn't detailed, the latest version indicates ongoing development and support for the application.